English /k/ vs /g/
"cap" vs "gap": voicing in velar stops

/k/ and /g/ are both velar stops -- tongue body contacts the soft palate. The only difference is voicing: /k/ has silent vocal cords, /g/ has buzzing vocal cords. This is the same voicing distinction as /p/ vs /b/ and /t/ vs /d/, but in the back of the mouth.

The ABX drill plays two reference sounds then a mystery sound X. Choose which one X matches. Five rounds to train the voicing distinction.

🔇Voicing only
👅Velar place
🤝Same articulation
💨Aspiration cue
Can you hear the difference?
How it works: You'll hear sound A, sound B, then a mystery sound X. Choose whether X matches A or B. Words are revealed after you answer.
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Listen carefully...

Mystery sound

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The problem

Why /k/ and /g/ cause errors across many language backgrounds

Voicing pairs are hard for many L1 speakers. The /k/-/g/ contrast relies on a single feature -- the presence or absence of vocal cord vibration -- that may not function as a contrastive feature in the learner's native language, or may interact differently with aspiration.

Without the distinction, "cap" sounds like "gap" in perception. Learners may produce both sounds the same way, leading to misunderstandings in common vocabulary like "cold/gold" and "back/bag."

English /k/ at word-initial position carries strong aspiration -- a burst of air after the stop release -- which can actually help learners distinguish /k/ from /g/ if they learn to listen for it.

What happens without training
  • ✗ "cap" sounds like "gap" in perception
  • ✗ "cold" and "gold" collapse together
  • ✗ "back" and "bag" sound identical at word end
  • ✗ "coat" and "goat" are confused
What changes with ear training
  • ✓ /k/ and /g/ become separate categories
  • ✓ You hear the aspiration burst on /k/
  • ✓ Word-final pairs like back/bag become clear
  • ✓ Production of /g/ in common words improves
Chinese speakers

Mandarin Chinese has both /k/ (unaspirated) and /kʰ/ (aspirated) as distinct phonemes, but does not use voicing as a contrastive feature for stops. The Mandarin contrast is aspiration, not voicing. English /k/ maps roughly to Mandarin /kʰ/ and /g/ maps to Mandarin /k/, but the categories are not identical -- Mandarin speakers may confuse the voicing dimension.

Thai / Vietnamese speakers

Thai has a three-way distinction in stops: voiceless unaspirated, voiceless aspirated, and voiced. Vietnamese has a similar system in some dialects. These languages provide relevant experience with aspiration contrasts, but the exact VOT categories differ from English, and the interaction with tones can complicate perception.

Korean speakers

Korean has a three-way stop distinction: lax (ㄱ), aspirated (ㅋ), and tense (ㄲ). None of these is straightforwardly "voiced" in the English sense. English /k/ maps roughly to Korean ㅋ (aspirated) and /g/ to ㄱ (lax), but Korean speakers may initially misperceive English /g/ as their lax stop rather than a voiced one.

Production guide

How to produce /k/ and /g/

/k/k -- cap, coat, back, cold
  1. 1. Raise the back of your tongue to contact the soft palate (velum).
  2. 2. Build up air pressure behind the contact point.
  3. 3. Release the contact with NO vocal cord vibration.
  4. 4. English /k/ is strongly aspirated at word start -- a clear puff of air follows the release.
Anchor words: cap, coat, back, cold, kill, lock, come, cat, key, keep, pick, rack
/g/g -- gap, goat, bag, gold
  1. 1. Same tongue contact: back of tongue to velum.
  2. 2. Activate vocal cords BEFORE the release -- feel the buzz in your throat.
  3. 3. Release the contact with voicing already running.
  4. 4. Much less aspiration than /k/ -- no strong air burst.
Anchor words: gap, goat, bag, gold, gill, log, gum, gab, get, give, pig, rag
The throat test

Place one hand on your throat. Say "gggg" -- you should feel vibration starting before the release. Now say "kkkk" -- the throat is still, and there is a burst of air after each release. Practice switching: "kkkgggkkkggg" while keeping the tongue contact in the same place. Only the voicing changes. This mirrors exactly the /f/-/v/ throat test but at the back of the mouth.

The aspiration cue

In English, word-initial /k/ is aspirated: hold your hand in front of your mouth and say "cap" -- you'll feel a puff of air on your palm. Say "gap" -- much less air. This aspiration cue is very reliable for listeners: if you feel or hear a burst of air, the word started with /k/. Learners can use this actively when producing the sounds.

Click to hear

Minimal pairs: tap each word to hear it

English word pairs where the only difference is /k/ vs /g/. Click each word to compare.

/k/ voiceless
/g/ voiced
a hat
↔
a gap in a wall
a winter garment
↔
a goat animal
the rear
↔
a bag
low temperature
↔
a precious metal
to kill
↔
gills of a fish
a lock
↔
a log
More /k/ words
capcoatbackcoldkilllockcomecatkeykeeppickrack
More /g/ words
gapgoatbaggoldgillloggumgabgetgivepigrag
Common questions

Frequently asked

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/k/ vs /g/ is just one English contrast

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